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PI3B162244

3.3V, Hot Insertion, 16-Bit, 4-Port BusSwitch

Pericom Semiconductor 

PI3B16244

PI3B162244 (25Ω)

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Power Supply Characteristics

Parameters Description

ICC

Quiescent Power

Supply Current

∆ICC

Supply Current per

Input @ TTL HIGH

ICCD

Supply Current per

Input per MHz(4)

Test Conditions(1)

Min. Typ(2) Max. Units

VCC = Max.

VIN = GND or VCC —

10 µA

VCC = Max.

VIN = 3.0V(3)

— — 750 µA

VCC = Max.,

A and B Pins Open

Control Input Toggling

50% Duty Cycle

— — 0.25 mA/

MHz

Notes:

1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device.

2. Typical values are at Vcc = 3.3V, +25°C ambient.

3. Per TTL driven input (control inputs only); A and B pins do not contribute to Icc.

4. This current applies to the control inputs only and represent the current required to switch internal capacitance at the specified

frequency. The A and B inputs generate no significant AC or DC currents as they transition. This parameter is not tested, but is

guaranteed by design.

PI3B16244 Switching Characteristics over Operating Range

Parameters Description

Conditions(1)

Com.

Min.

Max.

tPLH

Propagation Delay(2,3)

CL = 50pF 16244

0.25

tPHL

Ax to Bx, Bx to Ax

RL = 500Ω 162244

1.25

tPZH

Bus Enable Time

CL = 50pF

1

4.5

tPZL

BE to Ax or Bx

RL = 500Ω,

tPHZ

Bus Disable Time

R = 500Ω

1

5.0

tPLZ

BE to Ax or Bx

Units

ns

Notes:

1. See test circuit and waveforms.

2. This parameter is guaranteed but not tested on Propagation Delays.

3. The bus switch contributes no propagational delay other than the RC delay of the ON resistance of the switch and the load

capacitance. The time constant for the switch alone is of the order of 0.25ns for 50pF load. Since this time constant is much

smaller than the rise/fall times of typical driving signals, it adds very little propagational delay to the system. Propagational delay

of the bus switch when used in a system is determined by the driving circuit on the driving side of the switch and its interaction

with the load on the driven side.

Pericom Semiconductor Corporation

2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com

3

PS8170B 11/06/98

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